You can verify, in this simple example, that A + B is the same as B + A.

在这个例子中还可以验证,A + B = B + A

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And then on the right hand side I++, we saw that in pseudocode with our socks example last week that just says increment I.

然后是最右边的i++，我们上周在socks例子的伪代码中,曾经见到过，不是么？只是代表i加1而已。

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